Double-acting four-stroke diesel motor



May 19, 1925. 1,538,267

I H. H. BLACHE DOUBLE ACTING FOUR-STROKE DIESEL MOTO R Filed April 27. 1923 2 Sheets-Sheet 1 .27716/7729/ HHB/ache W Q 2 r May 19, 1925. 1,538,267

' H. x H. BLACHE DOUBLE ACTING FOUR-STROKE DIESEL MOTOR Filed April 27. 1923 2 Sheets-Sheet 2 firenror' MHZ/ache fly a %m W M/M Patented May 19, 1925;

- UNITED T T HANS HENRIK -BLA'CHE, or HELLERUP. NEAR cornnrmenn, DENMARK.

DDUBLE-ACTI NG FOUR-STROKE DIESEL Moron.

' Applicationfiled April 27, I923. Serial No. 635,113.

To all whom. it may concer /1,:

Be it known that Hans lrlnivnnt BLAorIE, a subject of the King of Denmark. residing at Hellerup, near Copenhagen Denmark, have invented certain new. and useful" Improvements in a Double-Acting Four-Stroke Diesel Motor, of which the following is a specification. Y I

This inventionrelates to a forui-stroln.

Diesel motor constructed as a (:louble-acting' normal place in the bottom of the cylinder and building them into a special chamber acting as a compression chamber and placed at one side of the cylinder level with the bottonr thereof. The employment of a special valve and compression chamber at the side of the cylinder is possible if the bottoms of the piston and the cylinder are so formed that, in the lowermost position of the piston, the clearance space between the latter and the bottom of the cylinder is as small as possible, so that the total compression volume is not increased beyond about 8% of the cylinder volume necessary to the compression volume.

The arrangement of valves in a chamber at one side of a cylinder is known per se e. from automobile motors but has not been previously used as a means whereby fourstroke Diesel motors maybe built as doubleacting.

The novel feature of the invent-km is partly the arrangement of the valves in the special compression chamber at one side of the cylinder with the necessity arising; there from of causing the piston to go wholly down, partly the special assembling of the cylinder and its bottom with the water jacket of the same necessitated by the side chamber. The water jacket is carried at its lower part by the machinetrame and the cylinder with integral parts is suspended in or carried by the jacket so that, owing to the valve chamber being placed at the side. the dismounting ofthe parts must be carried out by assembling the cylinder and annexed parts with the water jacket atthe top end of the cylinder and by a packing box other suitable packingaround the lower end ofth cylinder, while the upper portion of but divided by a longitudinal flange. enabling that part of the water acket which is above the special compression chamber at the side of the cylinder to be loosened and removed. J

By the abovedescribed double-acting four-stroke Diesel motormay be built, which means also that by the same dimensions oi the cylinder almost twice the work of the hitherto known four-stroke Diesel motors maybe obtained. Furthermore the I cylinder bottom. which has no openings for the great valves, is very resistant against the tensions caused by the heat.

In the drawing is represented a construe-- tional form of the invention.

F 1 is a sectional elevation of the entire construction. y i Fig. 2 is an elevation of the special compression chamber with the valves. and,

Fig. 3 is an elevation of the upper portion of the water jacket and the flange by which the halves of the jacket are tightened togetheri In Fig. 1, A is the cylinder which is into gral with the bottom B. its the drawii'ip' i shows, the bottom B has only one ope/ninenamely that in which the piston rod C and its packing box are mounted. The drawing shows the piston D in its lower dead point in which position there is ouly the necessary very little space between the piston and the bottom of the cylinder. i-kccording, to the inveutioin all valves are assembled in a special compression chamber F placed at the side of the lower part of the cylinder.

The compression chamber F communicates with the interior of the cylinder and contains, as shown in Figs. 1 and 2, the four valves, viz the suction valve G, the exhaust valve H, the fuel valve I and the starting valve K, Fig. 2.

The cylinder bottom itself is double, both for the sake of strength and for the purpose of forming part of the water acket. The exterior wall of the cylinder bottom is ex tended upwardly so as to form a circular flange L, Fig. 1. The entire cylinder construction is surrounded by and carried in the water .jacket is not made in one piece construction the cylinder acket P which rests at its bottom on the machine frame. The upper portion of the jacket is divided into two halves connected with each other by a vertical assembling flange as shown in Fig. 3 which represents the same jacket as in Fig. 1 but seen from its outer side. The cylinder A, Fig. 1, is provided at its top in the usual manner with a projection N resting on a corresponding projection O on the cylinder jacket I The projections N and O are tightened together by the top plate Q which is in the usual manner fixed to the jacket 1 by a suitable number of bolts ll and provided with a rib S entering the upper edge oi the cylinder wall. The entire space between the jacket and the cylinder and the great compartment in the cylinder bottom are employed as a cooling jacket for the cylinder. The tight oint between the cylinder jacket P and the flange L of the cylinder is obtained by a packing box T or another suitable packing.

I claim:

1. In a double-acting tour-strok Diesel engine having its cylinder liner suspended at its top so as to be free to expand down wardly, in combination, a cylinder liner, a bottom cover formed integrally with the cylinder liner and formed to receive a piston rod, a valve chamber integral with the com bined cylinder liner and bottom (over, all necessary valves being fitted in the valve chamber, a flanged cooling acket for ned ot a plurality of pieces and constituting apart of the engine frame and so connected to the cylinder bottom as to permit free expansion downwardly of the cylinder liner and valve casing relative to the cooling jacket.

2. In an engine according to claim 1 an annular projection on said cooling jacket. when assembled, suspending the upper end of said cylinder liner, and an upper cover fastened to the cooling jacket.

3. In an engine according to claim 1, said. cylinder bottom. having a sliding connection with said cooling acket forming part of the engine frame, so as to permit tree downward expansion of said cylinder liner and valve casing relative to the cooling jacket.

In testimony whereof I affix my signature.

HANS HENRIK BLACHE. 

